Wether you are superstitious or not Friday the 13th exists!
Different superstitions are:

Good Luck
Lucky to meet a black cat. Black Cats are featured on many good luck greetings cards and birthday cards in England.
Lucky to touch wood. We touch; knock on wood, to make something come true

Lucky to find a clover plant with four leaves.
White heather is lucky.

A horseshoe over the door brings good luck. But the horseshoe needs to be the right way up. The luck runs out of the horseshoe if it is upside down.Horseshoes are generally a sign of good luck and feature on many good luck cards.
On the first day of the month it is lucky to say "white rabbits, white rabbits white rabbits," before uttering your first word of the day.
Catch falling leaves in Autumn and you're have good luck. Every leaf means a lucky month next year.

Bad Luck

Unlucky to walk underneath a ladder.
Seven years bad luck to break a mirror. The superstition is supposed to have originated in ancient times, when mirrors were considered to be tools of the gods.
Unlucky to see one magpie, lucky to see two, etc..
Unlucky to spill salt. If you do, you must throw it over your shoulder to counteract the bad luck.
Unlucky to open an umbrella in doors.
The number thirteen is unlucky. Friday the thirteenth is a very unlucky day. Friday is considered to be an unlucky day because Jesus was crucified on a Friday.
Unlucky to put new shoes on the table.
Unlucky to pass someone on the stairs.

-----------------------------------------------------------------------------------------Keeping in mind that there are young children on this forum, here is the side of the 13th being LUCKY!Jess

A new survey shows people are becoming less superstitious about 'unlucky' Friday the 13th, the poll of 1,000 adults shows other superstitions are also less of a concern nowadays. In fact, three out of four questioned for a Surrey theme park said they had no intention of staying off work just because of the date.

Or maybe we should think positively, being positive could make you lucky. Being positive about anything and everything could also increase how you view and perceive things, and produce favorable results.

In fact, according to a report : Trying not to think a negative thought will result in thinking it more, Thinking is like breathing: It goes on night and day and you can’t stop it. But you can change it.

Or you should ask yourself something like this: “How can I make myself stronger and to deal with this?” Or “Can I get myself busy right now, very busy I forget all about my fears?

When you find yourself thinking negatively about something “bad” that happened, ask yourself “What’s good about this?” Or “How can I turn this to my advantage?” Ask a good question and automatically you will think positively.

"On the first day of the month it is lucky to say "white rabbits, white rabbits white rabbits," before uttering your first word of the day." I Do This And My Friend Did This Today In School "Unlucky to open an umbrella in doors.!"